參數(shù)資料
型號(hào): X9421YS-2.7
元件分類: 數(shù)字電位計(jì)
英文描述: Single Digitally Controlled (XDCP) Potentiometer
中文描述: 單數(shù)控(數(shù)字電位器)電位
文件頁(yè)數(shù): 18/21頁(yè)
文件大?。?/td> 117K
代理商: X9421YS-2.7
X9421
REV 1.1.6 8/1/02
Characteristics subject to change without notice.
18 of 21
www.xicor.com
APPLICATIONS INFORMATION
Electronic potentiometers provide three powerful application advantages: (1) the variability and reliability of a solid-
state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity of nonvolatile
memory used for the storage of multiple potentiometer settings or data.
Basic Configurations of Electronic Potentiometers
Basic Circuits
V
R
V
W
V
R
I
Three terminal Potentiometer;
Variable voltage divider
Two terminal Variable Resistor;
Variable current
V
H
V
L
Noninverting Amplifier
Voltage Regulator
Offset Voltage Adjustment
Comparator with Hysterisis
+
V
S
V
O
R
2
R
1
V
O
= (1+R
2
/R
1
)V
S
R
1
R
2
I
adj
V
O
(REG) = 1.25V (1+R
2
/R
1
)+I
adj
R
2
V
O
(REG)
V
IN
317
+
V
S
V
O
R
2
R
1
V
UL
= {R
1
/CR
1
+R
2
} V
O
(max)
V
LL
= {R
1
/CR
1
+R
2
} V
O
(min)
100K
10K
10K
10K
-12V
+12V
TL072
+
V
S
V
O
R
2
R
1
}
}
+5V
–5V
LM308A
Cascading Techniques
Buffered Reference Voltage
+
+5V
R
1
+V
–5V
V
W
V
W
V
OUT
= V
W
OP-07
V
W
V
W
+V
+V
+V
X
(a)
(b)
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